Nonslip insert for flat surfaces



March ?4, 1925;

' 1,530,752 1 G. w. BROOKS NONSLIP INSERT FOR FLAT SURFACES Filed 090.20, 1923 1N VENT OR A TTORNEY Patented Mar. 24, 1925.

GEORGE W. BROOKS, OI! KANSAS CITY, MISSOURI.

NONSLIP INSERT FOB FLAT SURFACES.

Application filed December 20, 1923.

To all whom it may concern:

Be it known that I, Gnonon W. Bnoons, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Nonslip Inserts for Flat Surfaces; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same, reference being had to the accompanying drawings, and to the figures of reference marked thereon, which form a part of this specification. k

This invention relates to non-slip inserts for flat surfaces and particularly to friction treads fOr side walks, steps and the like.

The invention is illustrated as an insert for the treads of concrete steps, the object being two-fold, first to provide a friction non-slip surface which will prevent pedestrians from slipping on the treads when they are moist and to provide wear resisting inserts imbedded in the material of which the steps are constructed and. by no means an insignificant feature of the invention is the provision of means for visualizing; clear lines of demarkation, denoting the edges of the steps to eliminate liability of mis-stepping on the steps, for example where the steps are made of stone or concrete, it is not always possible to determine the edge of the step or the edge of the platform at the top of a flight of steps, so it is a very easy manner to over-step in descending causing injury which will be eliminated by my invention, so associated with the step tread that a clear line of demarkation will always be present.

It is an important feature of my invention that it may be constructed inexpensively of sheet metal and readily inserted in the composition, side walks or steps or other construction, so as to provide an efficient, inexpensive non-slip insert.

In the drawings Fig. 1 is a perspective view of a step with my invention applied, part of the step being illustrated as broken away to show the con: struction of the insert.

Fig. 2 is a top plan view of an insert constructed in accordance with my invention.

Serial No. 681,882.

the step showing the longitudinal bars of the inserted cross section, and

Fig. 6 is a fragmentary view of a slightly modified form of bar.

In carrying out the invention the sheet 1 of appropriate material is provided and bars or strips 2 are cut therefrom, the edges of which are corrugated or formed of a series of compound connected curves, the bars being out without loss of material, thus maintaining the cost of production of the insert at a minimum. The bars are preferably punched to provide openings 3 through which concrete may pass so as to hold the insert in its bed. The bars are arranged in parallel longitudinal spaced relation by tie members shown as consisting of V-shaped members 4; having slots 5 therein to receive the bars 2. The triangular members 4 have notched ends 6 and 7 and arranged in pairs so that the free edge of one member will abut against the. free ends of the other member of its pair, the two sets of notches 8 forming a central opening to receive a bolt 9 with a nut 10 thereon so that the braces at may be fastened to the end side bars 2. The bolts 9 may be stove bolts if desired and these are recommended on account of eheapness.

The braces 4 may be of any preferred material, the longitudinal bars and the braces being preferably arranged diamond shaped as shown, making up an insert which may be imbedded in a surface to provide friction and to increase the wearing quality of the structure in which they are imbedded. For example, after they are imbedded in the step 11, the points 12 of the bars will be practically flush with the surface of the step so that they will be visible and so that the foot of the pedestrian may contact with the edges of the insert bars and obtain a friction grip on the surface to prevent slipping and also to provide against wear, since the wearing qualities of the metal will greatly exceed that of the concrete.

riser of the step and the. inner edge, oi. the. tread, I may provide a wear plate or rail 18" having inwardly projecting pontions; 14-.- and 15 imbedded 1n the concrete so as to prevent Wear of the concrete at theangle-ofi the-riser.-

in the tread. The tread of the step may be ribbed on guttered at 16 (Fig. 5) if desired in the usual Way.

I have illustrated a. simple, inexpensive, easily constructed, rugged insert for the; purpose described, but I Wish it to be under stood: that I do not wish to be: limited? to the exact details: of construction shown, because I am aware the changes" in: form, proportion and. ininon' details of construction may be resorted to: Without. departing fronnthe spirit 0% the invention or sacrificing any of its advantages.

In Fig. 6L1 haveshown a slightly modified formof longitudinal bar consisting of two side strips: 17 and 18 With the lead strip 1 9 between them. The lead strip 1 9 is'the same width or substantially so' throughout and it is provided with straight edges while the side strips 1 7 and 18 correspond inshape to the strip shown in the preferred form,

Ordinarily I recommend the construction shown in Figs. 1 to 5, but the modified form shown in Fig. 6 may be employed if desired.

hat I claim and desire to secure by LettersePatent is:.

1. A step and an insert therefor, the insert comprising parallel bars longitudinally or" the step having upper edges flush with the step to provide friction grips at the upper surface oil the step; so as to prevent slipping, and diamond shaped members connecting the bars,. the diamond shaped members d fining the Width of the step.

2. An insert tor flat surfaces comprising p'a nallel bars, the: upper edges oiiv Which are formed: \VIt-hl corrugations, the corrugated pontions of" adjacent spaced bars beingv oliset, the upper edges of the bars being substantially flush with. the top surface so as tosse-rveas friction members to prevent slipping;

8-. An insert tor flat surfaces comprising parallel bars, the upper edges of which; are formed, witlr corrugations, the corrugated pontions. of; adjacent spaced bars being olfset, the upe'r'edges of the'bars being. substantia lly flush with the top: surface so as to serve as friction members to prevent slipr ping, and transverse tie-bars visible at the surface in which the insert is iinbedded'. so that the'width of: theinsert will be appa rent.

In: testimony whereof I aiiin my signature.

IV. BROQKS. 

